focal length with great dramatic potential

See above. Mine is so poor I wonder if it is a bad sample in which case quality control may be suspect.

Mine is latest version bought in last year. Very dissappointing. Sharp and contrasty in central 2/3rds of frame but outer part shows a rapid and unacceptable decline in resolution. Very soft in corners. Improves a little stopped down below f8 but never becomes sufficiently good for professional landscape photography. You might just as well use 35mm!

Customer Service

Not used

Similar Products Used:

21mm 35mm format lenses from Nikon, Olympus and Zeiss (Contax G)

Nice, wide lens (21mm in 35mm) very little distortion. Well built, sharp

None considering type of lens. Filter size is 77mm.

For what I do (interiors, landscapes), this lens has been perfect. I always make sure I have enough emergency money to purchase another just in case. I've been very happy with Mamiya, and so have my clients.

Customer Service

never needed for this lens, but Mamiya reps have always been helpful in general

Similar Products Used:

Nikkor wides, Hass. SW

very sharp; compact and lightweighted;

Filter size of 77mm; at this lens the round filters (e.g. polarizers) of the Cokin P-System are not applicable without vignetting.

Great lens for interieur and outdoor photography: The widest angle I know for medium format SLR.

Customer Service

never needed

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45mm f/2.8; 55mm f/2.8

Very wide angle
Sharp lens
Low distortion
Huge depth of field

Heavy (I think)
Mamiya bayonet is not really easy to use

For use in landscape or architecural photography. You don't use that much such an angle and you must be very carefull to shot horizontaly. I use a tripod and a level indicator. It's necessary in architectural photography.
A rare and a little bit expensive lens but valuable one.

Customer Service

Never needed. Good unofficial one in Belgium (see Bara Photo Brussels)

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80mm 1,9

Solid, lightweight, affordable... a good performer.

The weakest lens in the M645 line. Resolution and contrast just not up to par. But have you seen the prices of the competition, Pentax excepted?

If you need a super-wide MF lens, this is a very affordable, very useable alternative. I don't like the RB 50 (poor) or RZ 50 (just good, though I've vot tried the ULD). If you want really yummy Mamiya wide-angles, try the M7 43 or 50 lenses.

Customer Service

Top notch.

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55/2.8--superb, equal to any similar FL MF lens on the market.
45/2.8--very good lens.

Excellent optics, tack sharp lens. Smooth focus and DOF from here to tomorrow! Even has IR markings

Weight

This has proven to be a top notch lens and is great for landscape and shooting in tight spots. Rectilinear image is wonderful but I still don't like shooting architecture with it, thats why I have an 8x10 camera. This is a rare lens so grab it if you see it

Customer Service

Not needed for this purchase but for others it has been first rate

Similar Products Used:

Mamiya 45mm